/Engine/Plugins/Editor/ObjectMixer/ObjectMixer/Source/ObjectMixer/Public/ObjectFilter/ObjectMixerEditorObjectFilter.h
Specify a list of property names corresponding to columns you don't want to ever show. For example, you can specify "Intensity" and "LightColor" to ensure that they can't be enabled or shown in the UI. Columns not specified can be enabled by the user in the UI.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintNativeEvent, BlueprintCallable, Category="Object Mixer") virtual [TSet](API\Runtime\Core\Containers\TSet)< [FName](API\Runtime\Core\UObject\FName) > GetColumnsToExclude() const